84103 is a Democratic stronghold. About 80% of voters here vote Democratic and 20% Republican.
About 62% of adults in 84103 typically vote, near the U.S. average of about 62%. Among adults in 84103, ~50% vote Democratic, ~12% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How 84103 compares
Among zip codes within 15 miles, 84103 leans more Democratic than 36 of 38 neighbors.
84103 runs about 82 points more Democratic than Utah as a whole. Utah leans Republican overall, while 84103 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 84103. The east side is the most Democratic-leaning (D+67) and the northwest side is the least Democratic-leaning (D+51), a spread of about 16 points.
Why 84103 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 84103, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 65% of adults in 84103 hold a bachelor's degree, about 37 points above the U.S. average of 28%. Dense areas vote Democratic, and 84103 sits in the top fifth on density (about 88%, above 87% of zip codes). 84103 runs against the grain of Utah, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 84103, UT sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 84103 looks the way it does
Renters vote less often than owners. About 53% of households in 84103 rent, about 28 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and 84103 sits in the top quarter on routine-care measures. High-crime urban areas turn out at lower rates, and 84103 sits in the top 15% on a violent-crime measure. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Utah Lieutenant Governor's Office, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.